Simulation and Analysis of Propylene Coordination Polymerization Process Based on Aspen (polymer) plus

Jinjin Wang; Wangbin Chen; Manlin Zhang; Bin Pan; Xiaorong Wang; Bin Wang

Jinjin Wang College of Chemistry, Chemical Engineering and Environmental Eng ineering, Liaoning Shihua University, Fushun, Liaoning 113001, China

Wangbin Chen College of Chemistry, Chemical Engineering and Environmental Eng ineering, Liaoning Shihua University, Fushun, Liaoning 113001, China

Manlin Zhang College of Science, Liaoning Shihua University, Fushun, Liaoning 113001, China

Bin Pan College of Science, Liaoning Shihua University, Fushun, Liaoning 113001, China

Xiaorong Wang College of Chemistry, Chemical Engineering and Environmental Eng ineering, Liaoning Shihua University, Fushun, Liaoning 113001, China; Chinese Academy of Sciences, Beijing 100190, P. R. China.

Bin Wang College of Chemistry, Chemical Engineering and Environmental Eng ineering, Liaoning Shihua University, Fushun, Liaoning 113001, China.

Summary: Based on the industrial conditions of coordination polymerization of polypropylene, Polymer plus was used to simulate and analyze the coordination process of propylene. The effects of the amount of propane, main catalyst (TiCl4), chain transfer agent (hydrogen), shielding gas (nitrogen), and monomer (propylene) on the number average degree of polymerization (DPN), the weight average degree of polymerization (DPW), the number average molecular weight (MWN), the weight average molecular weight (MWW), the polydispersity index (PDI), and the throughput of polypropylene were explored to guide actual production in this paper. Through analysis, the polymerization degree and molecular weight of polypropylene could be adjusted by hydrogen in actual production. The monomer (propylene) should be purified as much as possible to reduce the feed amount of propane. The increase of the propylene contributed to the molecular weight and polymerization degree of the product. The increase in the nitrogen feed amount had no effect on the product performance index. The feed amount of nitrogen could be adjusted as needed according to the actual equipment specifications. The catalyst has the greatest influence on the comprehensive performance index of the product, thus the amount of main catalyst TiCl4 must be strictly controlled.